High voltage thyristor valve multi-injection test method

Abstract

This invention provides a high voltage thyristor valve multi-injection test method, it can meet one way valve and double valve operation test and over current test requirements. It has high equivalence and good flexibility. It includes FACTS double way thyristor valve and normal direct current thyristor valve operation tests and over current test. This method is novel, flexible, can carry out many different test and their mixture test and including the high voltage thyristor valve different tests.

1. A high voltage thyristor valve multi-injection test method comprising:
 an alternating and direct high current injection circuit test method; 
 a voltage double injection circuit test method; and 
 a resistant injection circuit test method, wherein the alternating and direct high current injection circuit, voltage double injection circuit and resistant injection circuit are connected through thyristor valve samples, wherein,
 said alternating and direct high current injection test method comprises using the alternating and direct high current circuit to produces a high current to provide alternating or direct high injection current for the thyristor valve sample; 
 said voltage injection test method comprises using the voltage injection circuit to provide a forward high voltage and backward high voltage and different voltage ratio, and current ratio for the thyristor valve sample; and 
 said resistant voltage injection test method comprises using the resistant high voltage circuit to provide resistant injection voltage for the thyristor valve sample. 
 
 
     
     
       2. A high voltage thyristor valve multi-injection test method according to  claim 1 , wherein said alternating and direct high current injection circuit test further comprises:
 a one way valve temperature increasing test, and a double way valve temperature increasing test by injecting the alternating and direct current to the thyristor valve sample; 
 said voltage double injection circuit test method and alternating and direct high current circuit test method carry out together a one way valve and double way valve operation tests by injecting the high voltage and high current in the current and voltage at intervals repeatedly, the resistant injection circuit test method and the alternating and direct high current injection circuit test method carry out together a one way valve and double valve over current operation test by injecting the high voltage, high current and reverse high voltage at intervals repeatedly to the thyristor valve sample, wherein,
 the operation test method comprises the alternating and direct current source providing alternating or direct current, wherein the conduction angle is controlled by the thyristor valve sample trigging angle, the voltage double injection circuit provides high ratio current impulse for the thyristor valve sample when the high current is on and off on each direction, and adjust the wave form of the thyristor valve sample to approach the actual positive voltage or reverse voltage; and 
 the over current test comprises the alternating and direct current source providing alternating or direct current, and heating the thyristor valve sample to test temperature; wherein, at the beginning of test, the resistant injection circuit provides positive high voltage to the thyristor valve sample and then the isolating valve of the resistant circuit is shut down, isolating of the alternating and direct high current circuit is turned on to provide high fault current for the thyristor valve sample, then the isolating is shut down, and the isolating valve of the resistant is turned on to inject reverse high voltage.